import { _decorator, AnimationComponent, Component, SpriteFrame } from 'cc';
import { FSM_PARAMS_TYPE_ENUM } from '../Enums';
import { State } from '../Base/State';
import { SubStateMachine } from './SubStateMachine';
const { ccclass } = _decorator;

type ParamsValueType = boolean | number;

export interface IParamsValue {
    type: FSM_PARAMS_TYPE_ENUM;
    value: ParamsValueType;
}

export function getInitParamsTrigger() {
    return {
        type: FSM_PARAMS_TYPE_ENUM.TRIGGER,
        value: false,
    }
}

export function getInitParamsNumber() {
    return {
        type: FSM_PARAMS_TYPE_ENUM.NUMBER,
        value: 0,
    }
}

@ccclass('StateMachine')
export abstract class StateMachine extends Component {
    private _currentState: State | SubStateMachine = null;

    params: Map<string, IParamsValue> = new Map();

    stateMachines: Map<string, State | SubStateMachine> = new Map();

    animationComponent: AnimationComponent = null;

    waitingList: Promise<SpriteFrame[]>[] = [];

    getParams(paramsName: string) {
        if (this.params.has(paramsName)) {
            return this.params.get(paramsName).value;
        }
    }

    setParams(paramsName: string, value: ParamsValueType) {
        if (this.params.has(paramsName)) {
            this.params.get(paramsName).value = value;
            this.run();
            this.resetTrigger();
        }
    }


    get currentState() {
        return this._currentState;
    }

    set currentState(newState: State | SubStateMachine) {
        this._currentState = newState;
        this._currentState.run();
    }

    resetTrigger() {
        for (const [_, value] of this.params) {
            if (value.type === FSM_PARAMS_TYPE_ENUM.TRIGGER) {
                value.value = false;
            }
        }
    }

    abstract init(): void
    abstract run(): void
}

